Apparatus for mobile communication system which performs signal transmission by amplitude modulation and phase modulation
US7110730B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | Feb 26, 2003 |
| Grant date | Sep 19, 2006 |
| Priority date | — |
| Expiry date | Apr 5, 2024 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04B2001/0416
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A mobile communication system has a mobile phone in which a voltage is set corresponding to the characteristic variation of a PA even when a PA having characteristic variation is used. The mobile phone employs a polar loop method, which comprises an antenna (1) for transmission and reception of signal waves; an antenna switch (2) for switching the transmission mode and the reception mode; a BBLSI (3) having a function to control the transmission and reception; an RFIC (4) having a function for modulating and demodulating the transmitted and received signals; and a PA (5) for amplifying up to the target output power by means of the amplitude modulation at the time of the transmission.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.